CLDC-4168: Add mortgage length known to question page

app/models/form/sales/pages/mortgage_length.rb

@@ -9,7 +9,8 @@ class Form::Sales::Pages::MortgageLength < ::Form::Page
 
   def questions
     @questions ||= [
+      (Form::Sales::Questions::MortgageLengthKnown.new(nil, nil, self, ownershipsch: @ownershipsch) if form.start_year_2026_or_later?),
       Form::Sales::Questions::MortgageLength.new(nil, nil, self, ownershipsch: @ownershipsch),
-    ]
+    ].compact
   end
 end

app/models/form/sales/questions/mortgage_length.rb

@@ -19,5 +19,6 @@ class Form::Sales::Questions::MortgageLength < ::Form::Question
     2023 => { 1 => 93, 2 => 106, 3 => 114 },
     2024 => { 1 => 94, 2 => 107, 3 => 114 },
     2025 => { 1 => 84, 2 => 108 },
+    2026 => { 1 => 84, 2 => 108 },
   }.freeze
 end

app/models/form/sales/questions/mortgage_length_known.rb

@@ -0,0 +1,24 @@
+class Form::Sales::Questions::MortgageLengthKnown < ::Form::Question
+  def initialize(id, hsh, page, ownershipsch:)
+    super(id, hsh, page)
+    @id = "mortgage_length_known"
+    @type = "radio"
+    @answer_options = ANSWER_OPTIONS
+    @conditional_for = { "mortlen" => [0] }
+    @hidden_in_check_answers = {
+      "depends_on" => [
+        { "mortgage_length_known" => 0 },
+      ],
+    }
+    @question_number = QUESTION_NUMBER_FROM_YEAR_AND_OWNERSHIP.fetch(form.start_date.year, QUESTION_NUMBER_FROM_YEAR_AND_OWNERSHIP.max_by { |k, _v| k }.last)[ownershipsch]
+  end
+
+  ANSWER_OPTIONS = { "0" => { "value" => "Yes" }, "1" => { "value" => "No" } }.freeze
+
+  QUESTION_NUMBER_FROM_YEAR_AND_OWNERSHIP = {
+    2023 => { 1 => 93, 2 => 106, 3 => 114 },
+    2024 => { 1 => 94, 2 => 107, 3 => 114 },
+    2025 => { 1 => 84, 2 => 108 },
+    2026 => { 1 => 84, 2 => 108 },
+  }.freeze
+end

config/locales/forms/2026/sales/sale_information.en.yml

@@ -204,6 +204,13 @@ en:
             hint_text: "You should round up to the nearest year. Value should not exceed 60 years."
             question_text: "What is the length of the mortgage?"
 
+          mortgage_length_known:
+            page_header: ""
+            check_answer_label: "Length of mortgage known"
+            check_answer_prompt: ""
+            hint_text: ""
+            question_text: "Do you know the length of the mortgage?"
+
           extrabor:
             page_header: ""
             check_answer_label: "Any other borrowing"